INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income tax expense	$ 2,643	$ 17,179	$ 24,544	$ 82,907
Effective income tax rate	11.00%	34.70%	28.70%	36.00%
Increase (decrease) of valuation allowance, amount			$ 6,000
Discrete tax benefit	$ 5,400		5,400		$ 6,500
Interest and penalties accrued related to unrecognized tax benefits	$ 1,900		$ 1,900		$ 1,900